[R] Query on save.image()
Can anyone please tell me how can use save.image() function if it is placed
within a function (i.e. some level up from the base level environment)? Here I
experimented with following codes:
#rm(list=ls())
fn - function() {
x - rnorm(5)
save.image(f:/dat.RData)
}
fn()
However I see that, the object fn() is actually stored in dat.RData file, not
that x. I have gone through the help page and saw there is some argument
named envir
My question is if I need to supply some value against that argument, then what
should be the name of the required environment?
Additionally is there any option to see the hierarchy of different environments
at my current R session?
Thanks,
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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Re: [R] Query on save.image()
Hi,
I do not believe you can use the save.image() function in this case.
save.image() is a wrapper for save() with defaults for the global
environment (your workspace). Try this instead, I believe it does
what you are after:
myfun - function(x) {
y - 5 * x + x^2
save(list = ls(envir = environment(), all.names = TRUE),
file = myfile.RData, envir = environment())
}
Notice that for both save() and ls() I used the environment() function
to grab the current environment. This should mean that even if y
was defined globally, it would save a copy of the version inside your
function.
Hope that helps,
Josh
On Thu, Oct 14, 2010 at 9:25 AM, Megh Dal megh700...@yahoo.com wrote:
Can anyone please tell me how can use save.image() function if it is placed
within a function (i.e. some level up from the base level environment)? Here
I experimented with following codes:
#rm(list=ls())
fn - function() {
x - rnorm(5)
save.image(f:/dat.RData)
}
fn()
However I see that, the object fn() is actually stored in dat.RData file, not
that x. I have gone through the help page and saw there is some argument
named envir
My question is if I need to supply some value against that argument, then
what should be the name of the required environment?
Additionally is there any option to see the hierarchy of different
environments at my current R session?
Thanks,
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Query on save.image()
On Thu, Oct 14, 2010 at 11:56 AM, Joshua Wiley jwiley.ps...@gmail.com wrote:
Hi,
I do not believe you can use the save.image() function in this case.
save.image() is a wrapper for save() with defaults for the global
environment (your workspace). Try this instead, I believe it does
what you are after:
myfun - function(x) {
y - 5 * x + x^2
save(list = ls(envir = environment(), all.names = TRUE),
file = myfile.RData, envir = environment())
}
Notice that for both save() and ls() I used the environment() function
to grab the current environment. This should mean that even if y
was defined globally, it would save a copy of the version inside your
function.
I think the defaults are actually ok in this case:
myfun - function(x) {
+ y - 5 * x + x^2
+ save(list = ls(all.names = TRUE), file = myfile.RData)
+ }
print(load(myfile.RData))
[1] x y
Hadley
--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Query on save.image()
Hi,
Given what Hadley said, it looks like you don't need either one. In
any case the logic was this:
ls() gets the NAMES of the objects
save() gets the actual data
Suppose in your workspace you define:
y - Hello, from the Global Environment
and then you used that little function I showed, that defines:
y - 5 * x + x^2
ls() will only give you the name y, you still want save() to get the
values from the right environment.
Cheers,
Josh
On Thu, Oct 14, 2010 at 10:18 AM, Megh Dal megh700...@yahoo.com wrote:
Thanks Joshua for your reply. However I could not understand one logic. If I
write ls(envir = environment(), all.names = TRUE), I am actually telling R
to grab all objects within the current environment (in my case, which the
environment within fn()). Then what is the point to put again the same
against envir. By putting so, what I am going to tell R?
Thanks,
--- On Thu, 10/14/10, Joshua Wiley jwiley.ps...@gmail.com wrote:
From: Joshua Wiley jwiley.ps...@gmail.com
Subject: Re: [R] Query on save.image()
To: Megh Dal megh700...@yahoo.com
Cc: r-h...@stat.math.ethz.ch
Date: Thursday, October 14, 2010, 10:26 PM
Hi,
I do not believe you can use the save.image() function in
this case.
save.image() is a wrapper for save() with defaults for the
global
environment (your workspace). Try this instead, I
believe it does
what you are after:
myfun - function(x) {
y - 5 * x + x^2
save(list = ls(envir = environment(), all.names = TRUE),
file = myfile.RData, envir =
environment())
}
Notice that for both save() and ls() I used the
environment() function
to grab the current environment. This should mean
that even if y
was defined globally, it would save a copy of the version
inside your
function.
Hope that helps,
Josh
On Thu, Oct 14, 2010 at 9:25 AM, Megh Dal megh700...@yahoo.com
wrote:
Can anyone please tell me how can use save.image()
function if it is placed within a function (i.e. some level
up from the base level environment)? Here I experimented
with following codes:
#rm(list=ls())
fn - function() {
x - rnorm(5)
save.image(f:/dat.RData)
}
fn()
However I see that, the object fn() is actually stored
in dat.RData file, not that x. I have gone through the
help page and saw there is some argument named envir
My question is if I need to supply some value against
that argument, then what should be the name of the required
environment?
Additionally is there any option to see the hierarchy
of different environments at my current R session?
Thanks,
__
R-help@r-project.org
mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained,
reproducible code.
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Query on save.image()
Thanks Joshua for your reply. However I could not understand one logic. If I
write ls(envir = environment(), all.names = TRUE), I am actually telling R to
grab all objects within the current environment (in my case, which the
environment within fn()). Then what is the point to put again the same against
envir. By putting so, what I am going to tell R?
Thanks,
--- On Thu, 10/14/10, Joshua Wiley jwiley.ps...@gmail.com wrote:
From: Joshua Wiley jwiley.ps...@gmail.com
Subject: Re: [R] Query on save.image()
To: Megh Dal megh700...@yahoo.com
Cc: r-h...@stat.math.ethz.ch
Date: Thursday, October 14, 2010, 10:26 PM
Hi,
I do not believe you can use the save.image() function in
this case.
save.image() is a wrapper for save() with defaults for the
global
environment (your workspace). Try this instead, I
believe it does
what you are after:
myfun - function(x) {
y - 5 * x + x^2
save(list = ls(envir = environment(), all.names = TRUE),
file = myfile.RData, envir =
environment())
}
Notice that for both save() and ls() I used the
environment() function
to grab the current environment. This should mean
that even if y
was defined globally, it would save a copy of the version
inside your
function.
Hope that helps,
Josh
On Thu, Oct 14, 2010 at 9:25 AM, Megh Dal megh700...@yahoo.com
wrote:
Can anyone please tell me how can use save.image()
function if it is placed within a function (i.e. some level
up from the base level environment)? Here I experimented
with following codes:
#rm(list=ls())
fn - function() {
x - rnorm(5)
save.image(f:/dat.RData)
}
fn()
However I see that, the object fn() is actually stored
in dat.RData file, not that x. I have gone through the
help page and saw there is some argument named envir
My question is if I need to supply some value against
that argument, then what should be the name of the required
environment?
Additionally is there any option to see the hierarchy
of different environments at my current R session?
Thanks,
__
R-help@r-project.org
mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained,
reproducible code.
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
